The entire preservation story of the Maryland Campaign's gaps is here told in one graphic. Click to enlarge.
If you don't want to click, then peer. Red indicates "core combat areas" and green shows land the state owns.
Thanks to Tim Reese for this.
p.s. The League - on which I posted yesterday - is broadening its focus beyond the Civil War and a number of ACW preservationists have left the group ... which adds a wrinkle to their battlefield land sale.